Bow-trolley

See under trolley (def 4).
trolley car.
a pulley or truck traveling on an overhead track and serving to support and move a suspended object.
a grooved metallic wheel or pulley carried on the end of a pole (trolley pole) by an electric car or locomotive, and held in contact with an overhead conductor, usually a suspended wire (trolley wire) from which it collects the current for the propulsion of the car or locomotive.
any of various devices for collecting current for such a purpose, as a pantograph, or a bowlike structure (bow trolley) sliding along an overhead wire, or a device (underground trolley) for taking current from the underground wire or conductor used by some electric railways.
a small truck or car operated on a track, as in a mine or factory.
a serving cart, as one used to serve desserts.
Chiefly British. any of various low carts or vehicles, as a railway handcar or costermonger’s cart.
to convey or go by trolley.
off one’s trolley, Slang.

in a confused mental state.
insane:
He’s been off his trolley for years, but his family refuses to have him committed.

noun
(Brit) a small table on casters used for conveying food, drink, etc
(Brit) a wheeled cart or stand pushed by hand and used for moving heavy items, such as shopping in a supermarket or luggage at a railway station
(Brit) (in a hospital) a bed mounted on casters and used for moving patients who are unconscious, immobilized, etc
(Brit) See trolleybus
(US & Canadian) See trolley car
a device that collects the current from an overhead wire (trolley wire), third rail, etc, to drive the motor of an electric vehicle
a pulley or truck that travels along an overhead wire in order to support a suspended load
(mainly Brit) a low truck running on rails, used in factories, mines, etc, and on railways
a truck, cage, or basket suspended from an overhead track or cable for carrying loads in a mine, quarry, etc
(slang) off one’s trolley

mentally confused or disorganized
insane

verb
(transitive) to transport (a person or object) on a trolley
n.
see: off one’s head (trolley)